[Karl] took a string of mostly useless battery-powered Christmas lights and found a good use for them. He replaced the stock board with a boost convert and uses the two AA batteries as a 5V power supply when mains power isn’t handy.

3D printed appliance repair

The broken plastic piece seen here keeps a dishwasher closed while running. The part couldn’t be sourced by a repairman but the best solution turned out to be printing a perfect replacement part.

While I agree with the fix it yourself with what you got mentality, I could use a 3D printer for these kinda purposes. Think of all the lost battery covers that could be replaced!! Also it would be great for custom switchplates and LED indicator for in-car mods. Simpit, custom cases for your electronics… I have to have me a 3D printer!!!